高温合金表面激光熔铸镍基合金涂层的组织与耐磨性能  

Microstructure and Wear Resistance of Ni Based Alloy Coating on High Temperature Alloy by Laser Melt Casting

作　　者：刘其斌[1,2] 朱维东 陈江[1,2] 

机构地区：[1]贵州工业大学材料中心 [2]中国科学院金属腐蚀与防护研究所

出　　处：《钢铁研究学报》1999年第1期32-36,共5页Journal of Iron and Steel Research

基　　金：贵州省科委基金

摘　　要：研究了高温合金ＧＨ３３表面激光熔铸镍基合金涂层的组织和耐磨性能。结果表明，基材对涂层合金的稀释作用较小；涂层与基材之间形成良好的冶金接合；涂层基体组织为γ－Ｎｉ枝晶，枝晶间为γ－Ｎｉ、Ｍ２３（ＣＢ）６、Ｎｉ３Ｂ、Ｃｒ２Ｂ、ＣｒＢ、ＷＣ等；涂层耐磨性能的平均值较基材提高４倍以上。The microstructure and wear resistance of Ni based alloy coating on the high temperature alloy GH33 by laser melt casting have been studied. The experimental results showed that the substrate has a small dilution to coating alloy, and there exists excellent metallurgical bonding between coating and substrate. The results also indicated that the matrix substrate is γ Ni dendrite with other phases such as γ Ni, M 23 (CB) 6, Ni 3B, Cr 2B, CrB and WC existing in the coating. The wear resistance of coating is increased by four times on an average as compared with that of substrate.

关 键 词：高温合金 激光熔铸 涂层 组织 耐磨性 镍基合金 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG174.445[金属学及工艺—合金]